Cap for automobile-radiators and the like



H. S. MORGAN. AUTOMOBILE RADIATORS AND THE LIKE. APPLICATION FILED AUG-14. 1911.

CAP FOR My 5 W Swvewtoz h 1 5 attozwzxns,

to affect deleteriously the To all whom, it may concern:

Be it known that HENRY S. MORGAN, a citizen of the United States, and a resident of Poughk eepsie, in the county of Dutchess and State of New York, have invented an mprovement in Caps for Automobile-Radiators and the like, of which the following is a specification.

b his invention relates to caps for automol0 ke, and with regard to provide a cap constructed "primarily of molded material, with a' minimum of metal, the metal eing provided only for screw threads, at the point where the cap is attached to the rad' 1 Other objects will be in part part pointed out hereinafter.

heinvention accordingly consists in the features of construction, combinations elements and will be exemplified 1n the construction hereinafter set forth, and t e scope of the application of which will be indicated in the following claim.

In the accompanying drawings, in which is shown one of various possible 'embodiments of this invention,

*igure 1 is a top plan of a preferred form of cap.

Fig. 2 is a vertical section on the line 22 of Fig. 1 showing the cap in position on the top 0 the radiator pipe.

ig, 3 is a perspective of the threaded bushing removed from the molded material of t e cap.

Similar reference characters refer to corresponding parts throughout the several views of the drawings. I

his invention is characterized by constructing the metallic that the amount of metal used is with increase of temperature is insufiicient molded material of the cap. The molded covering material is preferably bakelite or condensite rather than hard rubber or other substance, since tie former have a relatively high elastic limit, and are unaffected by the action of steam or hot water and may therefore be directly exposed to the interior of the radiator without the interposition of metal.

Specification, of Letters Patent.

damage the molded material or to cause the metallic.

ecome separated from the molded any point. The metal,

parts in the article of tion, however, this liability to derangement by repeated differential expansion of the component elements is reduced to a minimum, d in many cases is eliminated entirely from the list of factors tending to shorten the life of the cap.

eferring now to the accompanying drawings, the bushing referred to above is denoted and may readily be formed into thin metallic brass piping by passing the same through an automatic threading machine and cutting the same of? bushing at one d, or they are provided with an annular top piece forming an annular shoulder for the radiator pipe to abut against when the cap is in position. The former type of cap requires a great deal more metal than the latter type, and of course requires a great deal more metal than the cap of the present invention. The latter cap, the annular metallic shoulder for the top of the radiator pipe, is a notable improvement on the former type, and is set forth in my Patent 7.,134:,890, dated April 6, 1915, for cap for automobile r 'ators and the like. The present inve; tion is an. improvement on both of these former types of caps.

The exterior covering (5, as will he is exposed interior 0 whereas in mer Patented Aug. 10, 1920.. Application filed August 14, 1917. Serial No.

y or may not noted above, the thickness of metal has by eliminating any metal across the top of 4c separated the covering. from the space inthe screw threads either to form a shoulder side the pipe in order to prevent the dele-- for the radiator pipe or to protect the terious action of the steam or hot water molded material from the action of the upon such covering. In the present case, steam and hot water within the radiator, however, the covering, Where it is exposed, the metal. content is kept'low enough so consists of a material which is not affected that the differential expansion of metal and by the action of steam. An admirable mamolded material with rise of temperature terial for this purpose is either the welldoes not give rise to mechanical strains that known bakelite or condensite, which conwould tend to crack the molded material sist of a properly treated mixture oi. phenol or to cause the metal to become loosened and formaldehyde. This material 18 molded from the molded material at any point.

over the top and around the sides of the The advantages of the present improvecap in any suitable manner, the bushing ment and their application will be obvious being preferably provided with grooves 6 without further exposition. They may be to retain the same; and then the molded maapplied to a variety of uses other than in terial is cured or hardened so as to form a radiator caps, all of which Will be readilyrigid impervious covering around the bushunderstood. ing, which it holds in place. I claim p t will be noted from the accompanying A cap for automobile radiators and the drawings that the amount of metal, preferlike, comprising a bushing adapted to fit a ably brass, used is simply enough to form radiator pipe and open at both ends, a covscrew threads for attaching the cap to the ering of hard moldable material unaffected radiator pipe. The top of the radiator by the action of steam or hot water and i e is seated against an annular shoulder having a relatively high elastic limit, said of the molded material, not of brass, so covering surrounding the periphery and that no metal is utilized even for this purclosing one end of the bushing, and proose. The axial length of the screw threads vided with an annular shoulder against is determined partly by the requirements which the end of said pipe may-abut, the for a secure fit of the cap upon the radiator ratio of mass and disposition of bushing to pipe, but this length is made as short as covering being low enough so that the bushmay be, in order to minimize the quantity ing does not crack the covering by difierof metal used. Similarly, the radial thickential expansion with changes of temperaness of the metal is kept to a minimum, and ture. is only sufficient to give to the metal enough In testimony whereof, I have signed my body so that the screw threads may be cut name to this specification this 13th day of into it and so that the metal may be se- August, 1917. curely held in position by the molded material. By this proportiomng of parts, and HENRY S. MORGAN. 

